package j2se.tankwar;

import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class Tank {
	public static final int XSPEED = 5;
	public static final int YSPEED = 5;
	public static final int WIDTH = 30;
	public static final int HEIGHT = 30;
	private int x, y;
	private int oldX, oldY;
	private static Random r = new Random();
	private boolean bL = false, bU = false, bR = false, bD = false;
	private boolean live = true;
	private boolean good =true;
	private Direction dir = Direction.STOP;
	private Direction ptDir = Direction.D;
	public TankClient tc;
	private int step = r.nextInt(12) + 3;

	public Tank() {
	}

	public Tank(int x, int y) {
		this.x = x;
		this.y = y;
	}
	
	public Tank(int x, int y, TankClient tc) {
		this(x, y);
		this.tc = tc;
	}
	
	public Tank(int x, int y, boolean good) {
		this(x, y);
		this.good = good;
	}
	
	public Tank(int x, int y, boolean good, TankClient tc) {
		this(x, y, good);
		this.tc = tc;
	}
	
	public Tank(int x, int y, boolean good, TankClient tc, Direction dir) {
		this(x, y, good, tc);
		this.dir = dir;
	}

	public void draw(Graphics g) {
		if(!live) {
			if(!good) {
				tc.tanks.remove(this);
			}
			return;
		}
		Color c = g.getColor();
		if(good) {
			g.setColor(Color.RED);
		} else {
			g.setColor(Color.BLUE);
		}
		g.fillOval(x, y, WIDTH, HEIGHT);
		g.setColor(c);
		switch(ptDir) {
		case L:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT/2);
			break;
		case LU:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y);
			break;
		case U:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y);
			break;
		case RU:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y);
			break;
		case R:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT/2);
			break;
		case RD:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT);
			break;
		case D:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y + Tank.HEIGHT);
			break;
		case LD:
			g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT);
			break;
		case STOP:
			break;
		}
		move();
	}
	
	public void move() {
		switch(dir) {
		case L:
			x -= XSPEED;
			break;
		case LU:
			x -= XSPEED;
			y -= YSPEED;
			break;
		case U:
			y -= YSPEED;
			break;
		case RU:
			x += XSPEED;
			y -= YSPEED;
			break;
		case R:
			x += XSPEED;
			break;
		case RD:
			x += XSPEED;
			y += YSPEED;
			break;
		case D:
			y += YSPEED;
			break;
		case LD:
			x -= XSPEED;
			y += YSPEED;
			break;
		case STOP:
			break;
		}
		if(this.dir	!= Direction.STOP) {
			this.ptDir = this.dir;
		}
		if(x < 0) {
			x = 0;
		}
		if(y < 30) {
			y = 30;
		}
		if(x + Tank.WIDTH > TankClient.GAME_WIDTH) {
			x = TankClient.GAME_WIDTH - Tank.WIDTH;
		}
		if(y + Tank.HEIGHT > TankClient.GAME_HEIGHT) {
			y = TankClient.GAME_HEIGHT - Tank.HEIGHT;
		}
		if(!good) {
			Direction[] dirs = Direction.values();
			if(step == 0) {
				step = r.nextInt(12) + 3;
				int rn = r.nextInt(dirs.length);
				dir = dirs[rn];
			}
			step --;
			if(r.nextInt(40) > 38) {
				this.fire();
			}
		}
	}
	
	private void stay() {
		x = oldX;
		y = oldY;
	}

	public void keyPressed(KeyEvent e) {
		int key = e.getKeyCode();
		switch (key) {
		case KeyEvent.VK_LEFT:
			bL = true;
			break;
		case KeyEvent.VK_UP:
			bU = true;
			break;
		case KeyEvent.VK_RIGHT:
			bR = true;
			break;
		case KeyEvent.VK_DOWN:
			bD = true;
			break;
		}
		locateDirection();
	}
	
	public void keyReleased(KeyEvent e) {
		int key = e.getKeyCode();
		switch (key) {
		case KeyEvent.VK_CONTROL:
			fire();
			break;
		case KeyEvent.VK_LEFT:
			bL = false;
			break;
		case KeyEvent.VK_UP:
			bU = false;
			break;
		case KeyEvent.VK_RIGHT:
			bR = false;
			break;
		case KeyEvent.VK_DOWN:
			bD = false;
			break;
		}
		locateDirection();
	}
	
	public void locateDirection() {
		if(bL && ! bU && ! bR && ! bD) {
			dir = Direction.L;
		}else if(bL && bU && ! bR && ! bD) {
			dir = Direction.LU;
		}else if(! bL && bU && ! bR && ! bD) {
			dir = Direction.U;
		}else if(! bL && bU && bR && ! bD) {
			dir = Direction.RU;
		}else if(! bL && ! bU && bR && ! bD) {
			dir = Direction.R;
		}else if(! bL && ! bU && bR && bD) {
			dir = Direction.RD;
		}else if(! bL && ! bU && ! bR && bD) {
			dir = Direction.D;
		}else if(bL && ! bU && ! bR && bD) {
			dir = Direction.LD;
		}else if(! bL && ! bU && ! bR && ! bD) {
			dir = Direction.STOP;
		}
	}
	
	public Missile fire() {
		if(!live) {
			return null;
		}
		int x = this.x + Tank.WIDTH/2 - Missile.WIDTH/2;
		int y = this.y + Tank.HEIGHT/2 - Missile.HEIGHT/2;
		Missile m = new Missile(x, y, good, ptDir, this.tc);
		tc.missiles.add(m);
		return m;
	}
	
	public Rectangle getRect() {
		return new Rectangle(x, y, WIDTH, HEIGHT);
	}
	
	public boolean isLive() {
		return live;
	}
	
	public void setLive(boolean live) {
		this.live = live;
	}
	
	public boolean isGood() {
		return good;
	}
	
	public boolean collidesWithWall(Wall w) {
		if(this.live && this.getRect().intersects(w.getRect())) {
			this.stay();
			return true;
		}
		return false;
	}
}
